Improvement in machines for cutting planchets and annular blanks



F.. M. HUNTINGTQN.. Machines fpr lliuttng Planc'hets and Annular Blanks.\lwl55-,8OOI'` l i Patented 0.c11.13,'1874.V V

` ,Egal .Y

UNITED STATES.

PATENT OFFICE. I

FREDERICK M. HUNTINGTON, OF CHICAGO, ILLINOIs, AssICNOR To FRANK sTURGEsa CO., OF SAME PLACE.

IMPROVEMENT IN MACHINES FOR CUTTING PLANCHETS AND ANNULAR BLANKS-Specification forming part of Letters Patent N0. 155,800, dated October13, 1874 application filed I August 12,1874.

To all whom it may concern:

Be it known that I, FREDERICK M. HUNT- INGTON, of Chicago, in the countyof Cook and State of Illinois, have invented certain new and usefulImprovements in Machines for Cutting and Burring Sheet-Metal Blanks, ofwhich. improvements the following is a full, clear, and exactdescription, which will enable others skilled in the art to which myinvention appertains to make and use the same, reference being had tothe accompanying drawing forming a part hereof, and in which- Figure 1is a vertical central section of a machine embodying my invention; Fig.2, a top or plan view of the male die and stripper; Fig. 3, a bottomview of the same; and Fig. 4, a central `cross-section thereof and ofthe female die. V

Like letters of reference indicate like parts.

' The object of my invention is to provide improved means for strippingthe scraps and the cut and burred disks from the dies.

In the drawing, A represents the frame of the machine. B is thedriving-wheel, mounted on a crank-shaft, C, having bearings in theframe; and D is a. connecting-rod or pitman, through the upper end ofwhich the crank-pin passes, and the lower end of which is connected to asliding block or head, E, riding in a guide-piece, Ffattached to theframe. G is the male die, attached tothe lower end of the part E. 4 Theupper end of this die is cut away, in the manner shown, forming alateral annular flange or shoulder on its lower end, from the lower edgeof which shoulder depends the part which is intended to enter the loweror female die. a a are headed pins passing vertically and freely throughthis shoulder,

. and arranged in a circle smaller than the part depending from it, asshown. H is a female die set into the base or table of the machine. I isa ring fitted nicely, but not tightly, into the groove in the die H, andresting on the springs c e. J lis a stripper, mounted freely on theshank of the male die, and lapping the vertical as well as thehorizontal face of the shoulder described. K K are vertical slidesplaying inY ways in the part E, and resting on the part J. L L arestops, preferably vertically adjustable, and arranged to limit theupward movement of the slides K K.

A In order to forln and burr the blanks, the metal sheets from whichthey are to be cut are properly arranged on the female die. By the timethe male die reaches the sheet the part J and the pins a a have alsoreached, or nearly reached, it, and rest upon it, while the upper die'enters the lower one. After the dies have performed their functions,and as soon as the male die begins to ascend, the burred blank ispushed-from the female die by means of the yielding ring I, and both itand the scrap cling to the' upper die. The slides K K reach the stops LL before the upward movement of the die ceases, and the blau-k is thusstripped from the die by means of the pins a a., and the scrap by meansof the part J.

Having thus described my invention, what Y.

I claim as new, and desire to secure by Letters Patent, is-

1. The combination of the stripper J, constructed substantially asdescribed, the die G, provided with a lateral flange or shoulder, forlimiting the downward movement of the stripper upon the die, andadjustable stops for limiting the upward movement of the stripper,substantially as and for the purpose speciiied.

.2. The combination of the stripper J, loosely mounted on the upper die,the pins a a, the slides K K, and the stops L L, substantially asspecified, and for the purposes set forth.

FREDERICK M. HUNTINGTON.

Witnesses:

F. F. WARNER, N. C. GRIDLEY.

